I have been receiving Botox for two years this month. I currently receive the injections every 8 weeks bc mine barely last for 6 weeks before I am in daily agony again. While receiving the injections I have had the benefit of my migraines being less intense, however, not less frequent. I have also noticed that I FEEL like I have to go to the bathroom a lot. Even if I went already, I often feel like I still have to go. I have not felt that it was an emergency if this is what you mean by urgency, but I do sympathize. The literature does state that some people will experience a difference in their bladder function and my neurologist told me that some migraine sufferers feel that they have to go to the bathroom more frequently during migraine attacks. If you have just begun Botox therapy, give it a chance. After three sessions, you can better decide if you can live with the side effects or if it is really working for you. My results were much different the third time than the first and it has been worth it for me. Good luck.